Armchair



FIG. 1 is a perspective front elevational view of an armchair showing the new design;

FIG. 2 is a perspective side elevational view of the armchair as seen from the right-hand side of FIG. 1;

FIG. 3 is a perspective plan view of the armchair; and

FIG. 4 is a perspective rear elevational view of the armchair. 

The ornamental design for an armchair, substantially as shown. 